package com.future.lock.pay;


import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Random;

public class OrderInfoUtil {

    /**
     * 生成订单信息
     *
     * @param price    价格
     * @param subject  产品描述
     * @param order_sn
     * @return
     */
    public static String buildOrderContent(double price, String subject, String order_sn) {
        return "{\"timeout_express\":\"30m\"," +//订单存在时间
                "\"product_code\":\"QUICK_MSECURITY_PAY\"," +//支付方式（快捷支付）
                "\"total_amount\":\"" + price + "\"," +//金额
                "\"subject\":\"" + subject + "\"," +//订单信息
                "\"body\":\"我是测试数据\"," + "\"out_trade_no\":\"" + order_sn + "\"}";//订单号
    }

    /**
     * 构造支付订单参数列表
     *
     * @param app_id
     * @param rsa2
     * @return
     */
    public static Map<String, String> buildOrderParamMap(String app_id, String biz_content, boolean rsa2) {
        Map<String, String> keyValues = new HashMap<String, String>();

        keyValues.put("app_id", app_id);

        keyValues.put("biz_content", biz_content);

        keyValues.put("charset", "utf-8");

        keyValues.put("method", "alipay.trade.app.pay");

        keyValues.put("sign_type", rsa2 ? "RSA2" : "RSA");

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        keyValues.put("timestamp", format.format(new Date()));

        keyValues.put("version", "1.0");

        keyValues.put("notify_url", "http://www.lingyuetec.com/MicroService/alipaycallback");

        return keyValues;
    }

    /**
     * 构造支付订单参数信息
     *
     * @param map 支付订单参数
     * @return
     */
    public static String buildOrderParam(Map<String, String> map) {
        List<String> keys = new ArrayList<String>(map.keySet());

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < keys.size() - 1; i++) {
            String key = keys.get(i);
            String value = map.get(key);
            sb.append(buildKeyValue(key, value, true));
            sb.append("&");
        }

        String tailKey = keys.get(keys.size() - 1);
        String tailValue = map.get(tailKey);
        sb.append(buildKeyValue(tailKey, tailValue, true));

        return sb.toString();
    }

    /**
     * 拼接键值对
     *
     * @param key
     * @param value
     * @param isEncode
     * @return
     */
    private static String buildKeyValue(String key, String value, boolean isEncode) {
        StringBuilder sb = new StringBuilder();
        sb.append(key);
        sb.append("=");
        if (isEncode) {
            try {
                sb.append(URLEncoder.encode(value, "UTF-8"));
            }
            catch (UnsupportedEncodingException e) {
                sb.append(value);
            }
        }
        else {
            sb.append(value);
        }
        return sb.toString();
    }

    /**
     * 对支付参数信息进行签名
     *
     * @param map 待签名授权信息
     * @return
     */
    public static String getSign(Map<String, String> map, String rsaKey, boolean rsa2) {
        List<String> keys = new ArrayList<String>(map.keySet());
        // key排序
        Collections.sort(keys);

        StringBuilder authInfo = new StringBuilder();
        for (int i = 0; i < keys.size() - 1; i++) {
            String key = keys.get(i);
            String value = map.get(key);
            authInfo.append(buildKeyValue(key, value, false));
            authInfo.append("&");
        }

        String tailKey = keys.get(keys.size() - 1);
        String tailValue = map.get(tailKey);
        authInfo.append(buildKeyValue(tailKey, tailValue, false));

        String oriSign = SignUtils.sign(authInfo.toString(), rsaKey, rsa2);
        String encodedSign = "";

        try {
            encodedSign = URLEncoder.encode(oriSign, "UTF-8");
        }
        catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return "sign=" + encodedSign;
    }

    /**
     * 要求外部订单号必须唯一。
     *
     * @return
     */
    private static String getOutTradeNo() {
        SimpleDateFormat format = new SimpleDateFormat("MMddHHmmss", Locale.getDefault());
        Date date = new Date();
        String key = format.format(date);

        Random r = new Random();
        key = key + r.nextInt();
        key = key.substring(0, 15);
        return key;
    }

}
